Prices in pounds · Three prices checked 6 November 2026
Three roaming in South Korea vs a travel eSIM
In South Korea, Three uses its Go Roam Around the World Extra prices. Here is what that costs for a long weekend, a week and a fortnight, next to a data-only travel eSIM for the same trip.
Photo: Inkwon hwang on Unsplash
Three vs eSIM in South Korea: 3, 7 and 14 days
Three’s lowest published option in South Korea for each trip length, next to a Graba SIM South Korea plan with about 0.7 GB a day.
- 3 days
- 7 days
- 14 days
Three roamingGraba SIM eSIM
| Trip | Three | Graba SIM eSIM | Difference |
|---|---|---|---|
| A long weekend3 days | £17.503-day pass | £3.493GB, 30 days | The eSIM is £14.01 less |
| A week7 days | £42.007-day pass | £8.9920GB, 30 days | The eSIM is £33.01 less |
| A fortnight14 days | £82.255-day pass + 3 × 3-day passes | £8.9920GB, 30 days | The eSIM is £73.26 less |
What’s included: Three: your UK calls, texts and up to 12 GB of your UK data. Graba SIM: data only, prepaid; your Three SIM stays in your phone for calls and texts. Graba SIM prices are live; Three prices checked 6 November 2026.
Sources: Three roaming (checked 6 November 2026). Prices change; check before you buy.
Graba SIM South Korea plans: data, validity and total price
Each plan is a one-off price for one eSIM. It starts when it first connects in South Korea, and hotspot use comes out of the same data.
Using your phone in South Korea
- ICN Seoul Incheon
- GMP Seoul Gimpo
- PUS Busan Gimhae
- CJU Jeju
- Seoul
- Fast 4G and 5G across the city, including most of the subway network.
- Busan
- Strong signal in the city, at Haeundae beach and on the KTX train from Seoul.
- Jeju Island
- Good in Jeju City and Seogwipo; hiking trails on Hallasan can be patchy.
- Gyeongju
- Covered in town and at the main historic sites.
- The DMZ
- Tours run from Seoul. Signal is limited near the border, and some areas don’t allow phone use.
Networks our South Korea plans use: SKTelecomLG Uplus
- Download Naver Map before you fly: Google Maps gives public transport routes but not full walking or driving directions in Korea. Papago translates signs and menus, and k.ride or Kakao T books taxis.
- The plan gives you data, not a Korean phone number. Some Korean sites only send codes to Korean numbers, so keep your UK SIM on for texts from your bank.
Going further with Three
- Japan (ferries and short flights from Busan to Fukuoka and Osaka): Three charges £8 a day (Go Roam Around the World Extra).
What you get for the money
Three Go Roam Around the World Extra
- £8 a day if you joined or upgraded on or after 18 December 2025; £7 a day if you joined between October 2021 and December 2025.
- Unlocks your UK calls, texts and up to 12 GB of your UK data a month.
- Three only charges on days you use your phone, but your Spend Cap has to be high enough to cover the daily charge or pass, or roaming can stop.
Graba SIM South Korea eSIM
- 3 plan sizes for South Korea, from 1GB, 7 days to 20GB, 30 days, each a one-off price.
- Runs on SKTelecom, LG Uplus in South Korea, with 5G where the network offers it.
- Data only. Your Three SIM stays on for calls and texts, so bank codes still reach you in South Korea.
Three in South Korea: questions
How much does Three roaming cost in South Korea?
£8 a day in Go Roam Around the World Extra (£7 on plans from 2021 to 2025), or £42 for a 7-day pass. Unlocks your UK calls, texts and up to 12 GB of your UK data. For a trip, that is 3 days: £17.50 (3-day pass); 7 days: £42.00 (7-day pass); 14 days: £82.25 (5-day pass + 3 × 3-day passes).
Is a travel eSIM cheaper than Three in South Korea?
It depends on the trip. Comparing Three’s lowest published option with a Graba SIM plan of about 0.7 GB a day: 3 days, the eSIM is £14.01 less; 7 days, the eSIM is £33.01 less; 14 days, the eSIM is £73.26 less. Three’s price also includes your UK calls, texts and up to 12 GB of your UK data.
Which apps do I need in South Korea?
Naver Map for directions, Papago for translation and k.ride or Kakao T for taxis. Download them at home on Wi-Fi. Google Maps works for public transport but not for full walking or driving directions.
Will I get a Korean phone number?
No. The plan is data-only. Keep your UK SIM switched on for calls and texts, such as bank codes, and use WhatsApp or KakaoTalk over the eSIM’s data.